And planishing tubes of aluminium allot



(No Model.) 2 Sheets -Sheet 1'.

P. A. ELLIS. MEANS FOR DRAWING AND PLANISHING TUBES 0F ALUMINIUM ALLOY.

No. 582,191. Patented May 11,1897.

FIC I FIG.2

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(No Model.) 2Sheets-Sheet 2. P. A. ELLIS.

MEANS FOR DRAWING AND PLANISHING TUBES OI ALUMINIUM ALLOY. No. 582,191.Patented May 11,1897.

UNITED STATES PATENT OFFICE.

FREDERICK ARTHUR ELLIS, OF LONDON, ENGLAND.

MEANS FOR DRAWING AND PLANlSHlNG TUBES 0F ALUMINIUM ALLOY.

SPECIFICATION forming part of Letters Patent No. 582,191, dated May 1 1,1897.

Application filed July 13, 1896. Serial No. 599,032. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK ARTHUR ELLIS, residing at London, England,have invented Improvements in Means for Drawing and Planishing Tubes ofAluminium Alloy, of which the following is a specification.

This invention relates to the drawing and planishing in one operationand on one drawbench of tubes of aluminium alloy with the object ofrendering the said tubes harder, more elastic, and of greater tenacitythan if drawn in a die in the usual manner.

To carry my invention into effect, I place a tube of aluminium alloyupon a mandrel provided with a gripping-head and draw the tube on adraw-bench through a fixed die, which may either be of the ordinarycharacter or of rollers rotatinglongitudinally to the tube.

Close to the fixed die I provide one or more revolving dies, each ofwhich is so arranged that the parts may be caused to press upon the tubeWith any desired pressure While revolving upon the part of the drawntube after it has left the drawing-dies. In this way I produce a rotaryor slightly spiral planishing due to the revolution of the die or diesover the whole surface of the tube as it passes longitudinally throughthe said revolving die or dies and after it has been drawnlongitudinally through the fixed die, and thus I develop a special grainthroughout the tube and largely increase its hardness, elasticity, andtenacity over that required in the ordinary longitudinal drawing, alsogiving it a smooth or planished surface. In addition to this drawing andplanishing I may finish the tube by an external polishing, removing alltool-marks and giving an excellent finish to the material.

In order that my invention may be the better understood, I now proceedto describe the.

same with reference to the drawings hereto annexed and to the lettersmarked thereon.

Figure 1 is a plan of my combined drawing and planishing bench. Fig. 2is an elevation of the same. Figs. 3 and at are enlarged detailelevations of power-driven rotary planishing-dies. of the fixed drawingroller-dies.

Fig. 5 is an end view Fig. 6 is a sectional detail of the rotatingplanishingdies.

A is the seamless tube or cylinder of aluminiu m alloy, mounted on asuitable mandrel provided with a usual neck and head a, by which thetube and mandrel are gripped for drawing by the ordinary tongs B andchain 1), hauled in any convenient manner.

The tube A is first drawn through the fixed dies O O, which areroller-dies adapted to be pressed together with any desired amount offorce. The tube of aluminium alloy so drawn is deficient in elasticityand tenacity, and to confer these latter qualities upon the drawn tube Iprovide planishing-dies D D with splayed or bell-mouthed faces towardthe entering tube, as shown in Fig. 6, and carried in a geared head E,mounted on a bracket F, rotated by gearing G G at a high speed, such assix hundred revolutions per minute, from a counter-shaft H, mounted on abracket K and driven from any convenient source by a strap on fast andloose pulleys L L or by other equivalent means.

The dies D D are adapted to close together forcibly, (preferably by thepressure of setscrews M M,) so as to produce any desired embracing gripand thus a swaging or planishing upon the tube A as it passeslongitudinally through the drawing and planishing dies under the drag ofthe hauling-chain b.

The rapid rotary and squeezing action of the swaging or planishing diesD confers great increased hardness, elasticity, and tenacity upon thealuminium tube so treated and produces a planished surface, removing alltool-marks prod need by the longitudinal draw through the fixedroller-dies O 0.

Having now particularly described and as certained the nature of thisinvention and in what manner the same is to be performed, I

declare that what I claim is 1. In combination, roller-dies, a supporttherefor affixed to a draw-bench, means for producing mutual pressure ofsaid roller-dies, 5

means for drawing a tube through said dies, swaging or planishing diesembracing the tube, a geared rotating head carrying said dies and meansfor rapidly rotating said head.

2. In combination, roller-dies, a support In testimony whereof I havesigned my 10 name to this specification iri the presence of twosubscribing witnesses.

FREDERICK ARTHUR ELLIS.

\Vitnesses:

RICHARD A. HOFFMANN, CHARLES H. CARTER.

